三带自适应提升双正交滤波器组

Three-band Adaptive Biorthogonal Filterbanks via Lifting

该文研究了利用三带提升方法设计三带自适应双正交的滤波器组,在设计中,用于带编码增益作为设计准则,从任意一个滤波器组(标准正交或双正交)开始,通过有序自适应提升方法来设计三带双正交滤波器组。最后,给出例子说明,当选择一个合适初始滤波器组时,子带码增益可以得到较大提高。

Three-channel adaptive biorthogonal filterbanks via lifting scheme are investigated. Using the subband coding gain as the criterion in design, starting from an arbitrary filterbank (orthonormal or biorthogonal), three-channel biorthogonal filterbanks are designed by the sequential adaptive lifting scheme. Finally, experimental results show that the subband coding gains can be improved when an appropriate initial filterbank is chosen.